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ben45
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Joined: 2008-02-28
Points: 0

Hi everyone,
I am new in the software field and I want to read XML from a file by using Visual C# .NET . Please provide a solution for this and also provide me the list of software development companies specializes in the development of custom software applications which deals with custom programming, database design, client-server and internet/intranet software application development on all platforms including windows, Linux, Mac.

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patrik12
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Joined: 2008-03-01
Points: 0

Hi Ben

In response to your first question regarding XML:
1. Start Visual Studio 2005 or Visual Studio .NET.
2. Create a new Visual C# Console Application. You proceed directly to the "Complete code listing" section or continue through these steps to build the application.
3. Make sure that the project contains a reference to the System.Xml.dll assembly.
4. Specify the using directive on the System.Xml namespace so that you are not required to qualify XmlTextReader declarations later in your code. You must use the using directive before any other declarations.

using System.Xml;

5. Create an instance of an XmlTextReader object, and populate it with the XML file. Typically, the XmlTextReader class is used if you need to access the XML as raw data without the overhead of a DOM; thus, the XmlTextReader class provides a faster mechanism for reading XML. The XmlTextReader class has different constructors to specify the location of the XML data. The following code creates an instance of the XmlTextReader class and loads the Books.xml file. Add the following code to the Main procedure of Class1.

XmlTextReader reader = new XmlTextReader ("books.xml");

6. Read through the XML. (Note that this step demonstrates an outer "while" loop, and the next two steps demonstrate how to use that loop to read the XML.) After you create the XmlTextReader object, use the Read method to read the XML data. The Read method continues to move through the XML file sequentially until it reaches the end of the file, at which point the Read method returns a value of "False."

while (reader.Read())
{
// Do some work here on the data.
Console.WriteLine(reader.Name);
}
Console.ReadLine();

7. Inspect the nodes. To process the XML data, each record has a node type that can be determined from the NodeType property. The Name and Value properties return the node name (the element and attribute names) and the node value (the node text) of the current node (or record). The NodeType enumeration determines the node type. The following sample code displays the name of the elements and the document type. Note that this sample ignores element attributes.

while (reader.Read())
{
switch (reader.NodeType)
{
case XmlNodeType.Element: // The node is an element.
Console.Write("<" + reader.Name); Console.WriteLine(">");
break;
case XmlNodeType.Text: //Display the text in each element.
Console.WriteLine (reader.Value);
break;
case XmlNodeType. EndElement: //Display the end of the element.
Console.Write("");
break;
}
}

8. Inspect the attributes. Element node types can include a list of attribute nodes that are associated with them. The MovetoNextAttribute method moves sequentially through each attribute in the element. Use the HasAttributes property to test whether the node has any attributes. The AttributeCount property returns the number of attributes for the current node.

while (reader.Read())
{
switch (reader.NodeType)
{
case XmlNodeType.Element: // The node is an element.
Console.Write("<" + reader.Name); while (reader.MoveToNextAttribute()) // Read the attributes. Console.Write(" " + reader.Name + "='" + reader.Value + "'"); Console.WriteLine(">");
break;
case XmlNodeType.Text: //Display the text in each element.
Console.WriteLine (reader.Value);
break;
case XmlNodeType. EndElement: //Display the end of the element.
Console.Write("");
break;
}
}

9. Save and close your project.

Back to the top
Complete code listing

using System;
using System.Xml;

namespace ReadXMLfromFile
{
///
/// Summary description for Class1.
///
class Class1
{
static void Main(string[] args)
{
XmlTextReader reader = new XmlTextReader ("books.xml");
while (reader.Read())
{
switch (reader.NodeType)
{
case XmlNodeType.Element: // The node is an element.
Console.Write("<" + reader.Name); Console.WriteLine(">");
break;
case XmlNodeType.Text: //Display the text in each element.
Console.WriteLine (reader.Value);
break;
case XmlNodeType.EndElement: //Display the end of the element.
Console.Write("");
break;
}
}
Console.ReadLine();
}
}
}
In response to your second question:

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Databases:
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Low level programming in C, C++

Palmtop/Handheld Computing using Palm OS, Windows CE platforms
Linux:
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ERP:
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Others:
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